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23 January, 06:33

If F (x) = x²+1

What is f (f (x)) ?

A. X^4+2x^2+1

B. X^4+2x^2+2

C. X^4+2

D. X^4+1

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Answers (1)
  1. 23 January, 08:33
    0
    B. x^4+2x^2+2

    Step-by-step explanation:

    (x^2+1) ^2+1

    = (x^2+1) (x^2+1) + 1

    = (x^4+x^2+x^2+1) + 1

    =x^4+2x^2+2
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